"We don't have any metros over there, it's always been on my bucket list to flip onto a train or a bus," he told MTL Blog.
"So I had to do it when I got to Montreal."
He explained that he and his friends worked out the height and the timing of the train. "After that I just told my friends to film me and I did it."
"The one thing that takes confidence is the fact that I've been practising backflips for a long time but, sometimes it can turn out badly and I might not land it," he said.
"I'm really happy with the result of my video but I still have a little knee pain."
It goes without saying that this was an incredibly dangerous stunt and should not be attempted.
In a statement previously shared with MTL Blog, the STM said that it's "aware of this video and the information is already in the hands of [its] Safety and control team."
"The STM strongly condemns such acts, which are extremely dangerous," it said.
"It could have led to serious injury or even death, and/or damaged the train and cause a metro interruption."